1980 might be a stretch. I think we have limited data that goes back to .... 2001?
Okay, Space Mountain's peak wait on 12/31/2001 was 120 minutes, between 2 pm and 3 pm.
The peak wait time on 12/31/2019 was ... 240 minutes (from 12:41 pm to 2:27 pm, and later from 4:22 to 5:13).
So the peak wait doubled in 18 years. That's interesting.
@Sbk1234 you can change the date and attraction in this URL to see past dates for which we have data:
https://touringplans.com/magic-kingdom/attractions/space-mountain/wait-times/date/2019-12-31.
Let me know if a subscription is needed to see that - I'll hook you up:
len@touringplans.com.